/*
 * Name: Minh-Tuan ta
 */

package filters;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

/**
 * Servlet Filter implementation class LastURLFilter
 */
public class LastURLFilter implements Filter {

    /**
     * Default constructor. 
     */
    public LastURLFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		HttpServletRequest httpServletRequest = (HttpServletRequest)request;
		HttpSession session = httpServletRequest.getSession();
		String queryString = httpServletRequest.getQueryString();

		// pass the request along the filter chain
		chain.doFilter(request, response);
		
		String lastURL = httpServletRequest.getServletPath().substring(1);
		if (queryString != null)
		{
			lastURL += "?" + httpServletRequest.getQueryString();
		}
		
		session.setAttribute("LastURL", lastURL);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
